SAXSdb — 2kj1

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1. Protein Identity and Related Structures Protein Identity & Related Structures

BM2 protein

Influenza B virus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9WD75_9INFB
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–84； UniProt 26–109 Author chain B； PDBConstruct 1–84； UniProt 26–109 Author chain C； PDBConstruct 1–84； UniProt 26–109 Author chain D； PDBConstruct 1–84； UniProt 26–109

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	2kj1
Deposition date deposition_date	2009-05-13
Structure title title	cytoplasmic domain structure of BM2 proton channel from influenza B virus
Keywords keywords	BM2, influenza B, cytoplasmic domain, coiled coil, TRANSPORT PROTEIN; TRANSPORT PROTEIN
Experimental Method method	SOLUTION NMR

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

2kj1__assembly_1__model_6

Assembly 1 · Model 6 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2kj1__assembly_1__model_6 | I(q)

100 plotted points; both axes use logarithmic scales.

2kj1__assembly_1__model_6 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	24.21 Å
Rg (electron density)	23.97 Å
Total Rg	24.68 Å
Atom count	3900
Residues	244
Excluded volume	34459 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2kj1__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	2	`2kj1__assembly_1__model_2`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	3	`2kj1__assembly_1__model_3`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	4	`2kj1__assembly_1__model_4`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	5	`2kj1__assembly_1__model_5`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	6	`2kj1__assembly_1__model_6`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	7	`2kj1__assembly_1__model_7`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	8	`2kj1__assembly_1__model_8`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	9	`2kj1__assembly_1__model_9`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	10	`2kj1__assembly_1__model_10`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	11	`2kj1__assembly_1__model_11`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	12	`2kj1__assembly_1__model_12`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	13	`2kj1__assembly_1__model_13`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	14	`2kj1__assembly_1__model_14`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	15	`2kj1__assembly_1__model_15`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (1)

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id	2kj1A00
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	350 —

Domain ID domain_id	2kj1B00
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	350 —

Domain ID domain_id	2kj1C00
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	350 —

Domain ID domain_id	2kj1D00
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	350 —

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Description description	BM2 protein
Molecular weight formula_weight	10369.9 kDa
Source method src_method	man
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	58500

Source organism organism	Influenza B virus
NCBI taxonomy ID ncbi_taxonomy_id	11520
Host organism host_organism	Escherichia coli

cytoplasmic domain structure of BM2 proton channel from influenza B virus

1. Protein Identity and Related Structures Protein Identity & Related Structures

BM2 protein

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

2kj1__assembly_1__model_6

2kj1__assembly_1__model_6 | I(q)

2kj1__assembly_1__model_6 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

5. Entities and Polymers Entities & Polymers (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)

cytoplasmic domain structure of BM2 proton channel from influenza B virus

1. Protein Identity and Related Structures Protein Identity & Related Structures

BM2 protein

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

2kj1__assembly_1__model_6

2kj1__assembly_1__model_6 | I(q)

2kj1__assembly_1__model_6 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

5. Entities and Polymers Entities & Polymers (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)